Capoue drew first blood in the 34th-minute when he side-footed in Daryl Janmaat's ground pass as Anthony Martial was taken off appearing to suffer from concussion following a clash of heads with Janmaat.

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But United got fortunate with their 62nd-minute equaliser with Zlatan Ibrahimovic's cross bouncing off the arm of Valon Behrami and into Rashford's path for him to tap in.

However, Zuniga was on hand to slot home Roberto Pereyra's pass and lift Watford into the top half.

Matters got worse for United in injury-time when Troy Deeney smashed home a penalty after Marouane Fellaini's foul for their first win over the Red Devils in 30 years.

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Vicarage Road can be a bit quiet at times but the atmosphere at the ground beforehand– with loads of fans waving flags – was excellent.

England boss Sam Allardyce must have been a happy man. Chris Smalling and Marcus Rashford got their first Premier League starts of the season.

Watford fans could not believe their team wasting lots of chances early on. Prodl should have scored but the miss of the season came from Ighalo after a dropped catch by De Gea.

Referees are under orders to stamp out indiscipline from players but they should still penalise play-acting. Pereyra was a disgrace, falling to the ground clutching his face after minimal contact from Fellaini.

Odion Ighalo reacts to his astonishing open-goal miss against Man United

The advertising hoarding at Watford on top of both dugouts are for a drink call Bulldog Power Sport. Ever seen it in a shop?

Vicarage Road erupted when Capoue scored the opener. This was his fourth of the season – not bad when you consider he failed to score for Watford last season and managed just one in two years at Spurs – and that was in a 5-1 loss to Manchester City in January 2014.

After the goal, Martial stayed down injured and was then helped down the tunnel looking in pain.